Automatic fire-alarm.



No. 814,123. I PATBNTED MAR. 6, 1906.

N. H. FERLAND.

AUTOMATIC FIRE'ALARM.

APPLICATION mum JUNE 3,1905.

' Fig.6- v Q \A/ITN ESSES. {NW-INTE Q/JEZKTM Y UNITED STATES PATENTOFFICE.

NAPOLEON H. FERIJAND, OF'MANGHESTER, NEW HAMPSHIRE, ASSIGNOR I OFONE-THIRD TO JOSEPH A. CI IOQUET'IE,v OF MANCHESTER, NEW

HAMPSHIRE.

AUTOMATIC FlRE -ALARM- Patented March a, 1906.

Application filed June 3, 1905. Serial Ncl 283,526-

To all whom it may concern:

Be it known that I, NAPOLEON H. FERLAND, a subject of the King of GreatBritain, residing in Manchester, in the county of Hillsboro and Stateof'New Ham shire, have invented certain new and useful m rovements inAutomatic Fire-Alarms, of w 'ch the following is a specification.

In this invention a small box adapted to be secured to the wall orceiling of a room is provided, said box being placed in an electricalcircuit, the electric wires entering and passing through the box. 1 Ametallic spring extends from one wire to a point near the other wire,but is held out of contact with the lastnamed wire by means of a stripof celluloid which is located near a window in the case.

the left.

This window is closed by means of two layers of celluloid, a portion ofone of which extends out into the room. In case of fire when the flamesreach the projecting iece of celluloid it is ignited, together with t elayers constitutingthe window, and the flames connect with the strip ofcelluloid holding up the said spring), allowing it to drop upon theelectric wire eneath and complete the circuit and sound the alarm. Meansare provided for preventing access to the interior of the case withoutbreaking in the window and for rendering the case dust-proof.

The nature of the invention is fully described in detail below andillustrated in the accompanying drawings, in which- Figur with the frontwall removed. Fig. 2 is an inverted plan of the same. Fig. 3 is a sec-:tion taken on line 3 3, Fig. 1, looking toward Fig; 4 is an invertedplan with the bottom removed. Fi 5 is a view of the hook which is rovidefor breaking into the window and isengaging the spring for the purposeof gainingv access to the interior.

ig. 6 is a diagrammatic view showing a series of my fire-alarms incircuit with an annunciator and gong.

Similar characters of reference indicate corresponding parts.

0 represents the top, I) the bottom, 0 the front wall, (1 the rear wall,and e the ends, of a case or box, one or more of which maybe placed in aroom or a series in different rooms and all of which may be connected bywires 10, 11, and 12 with an annuiioiator 13, which is connected by awire 14 with a gong 15. A

e 1 is a front elevation of my device wire-16 leads to the battery 17,which is connected by a wire 18 with the firealarm boxes, a suitableswitch 19 being provided.

' The wires 10 and 18 enter the case and are securedto the rear wall (1in themanner indicated in Fig. 1, said wires being-parallel and strippedof their insulation at 20, a sheet of insulating material 21 beingpreferably placed between the wires at their stripped portions and therear wall of the case and extending from one wire to the other. Ametallic arm f is bent around and secured to the stripped portion of theWire 18 and extends therefrom over the Wire 10 and to a point somewhatbeyond it and is bent upward near its free end at f and'thence downwardinto the hook f A spring g lies on the upper side of this arm and isheld by its rear end under the washer h, which is held down on saidspring by the screw h, thus causing the spring to press normallydownward the arm f. A rod k' extends horizontally from the in ahorizontal (position by and between the end is of the ro 7c and thehooked, end 1' of .the s ring-arm f, holding the spring-arm raise andout of contact with the Wire 10, suitable holes being provided in thecelluloid strip for the pur ose. This strip is held near and parallelwit a window at in the bottom I) of the case, said window being closedby two sheets of celluloid and m, held in position by suitable cleats n.The outer sheet m is cut to provide a tongue 0, which is bent down--ward therefrom into the room.

In case of a fire when the flames reach the tongue 0 it is i nited andignites the rest of the sheet m and the sheet and then causes the stripZ to take fire. T e burning of the strip 1 releases the end of thespring-arm which instantly drops onto the wire 10, ma ing an electricalconnection between said wire and the wire 18, completing the circuit andoperating the annunciator and alarm. The annunciator being connected todifferent firealarm boxes indicates -in the ordinary man nerwhich box isaffected by the flames.

In order to prevent tam ering with the box and yet render it accessiblein case of necessity by breaking or pushing in the window,

the rear wall (1 is removable, not being nailed or screwed to the restof the box, but being held in position at its upper edge by rabbets 11,while its lower ed e is notched at r and provided in said note with adownwardlyextending pin s, Figs. 1, 3, and 4. Aspring t is secured atits rear end at u to the bottom I), and its free end extends normally upinto enga ement with the pin 8 by means of a suita le hole in thespring. In order to gain access to the interior of the box, a hook v isused to break or push in the window and to draw down the spring b meansof its end '0. Thus the rear wall can e swung out and removed from thecase.

As the only portion'of the box which is removable is the rear wall andasthe window is closed by the two sheets of celluloid, the box isgaclztically dust-proof.

'le I have selected celluloid as probably the best substance for mypurpose to be applied to the window and to hold up the spring- -arm fromthe electric wire, I ropose to use any material or substance in t emanner described and in the two places indicated which is sufficientlyinflammable and which will in other respects operate exactly as well asthe celluloid. In other words, it may be an equivalent of the celluloid.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. In an automatic fire-alarm of the character described, a closed box,wires entering said box ada ted to constitute an electric cir cuit, ametal '0 arm in electrical contact with one of the wires and extendingover the other 2. In an automatic fire-alarm of the character described,a closed box, wires entering said box ada ted to constitute anelectrical 'circuit, a meta ic arm in electrical contact with one of thewires and extending over the other wire, a strip of inflammable materialone end of which is secured to the metallic arm, means.

' ment in which the box is placed, for the purpose set forth.

3. In an automatic fire-alarm of the char acter described, a closed box,wires enterin said box.adapted to constitute an electrica circuit, ametallic arm in electrical contact with one of the wires and extendingover the other wire, a strip of inflammable material one end of whichis'secured to the metallic arm, means connected with the op osite end ofthe strip whereby the free end 0 said arm is held normally out ofcontact with the wire, a window in said box closed by a sheet ofinflammable material, one of the walls of said box being notched at oneof its edges, a pin extending from said wall into the notch, and a s rinextending from one of the other wal s o the box into engagement withsaid in, said spring being adapted to reached y breaking the saidwindow, for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

NAPOLEON H. FERLAND.

Witnesses:

J. A. BoIvIN, J. B. REZIMBAL.

